The Airspeed Long Sleeve shirt performs best in the hot sun with high humidity and no breeze because it's designed with a technical nylon/poly blend that wicks moisture, dries quickly and has UPF 30 sun protection. The high-tech knit mesh panels on the back and arm panels have mechanical stretch for freedom of movement and they allow air to flow for maximum ventilation. The sleeves are also constructed with Kuhl's exclusive 5-panel design for full range of motion and superior comfort. A built-in sunglass cleaning wipe inside the bottom left placket, roll-up sleeves with button tabs and a button-down collar are just a few more features the Airspeed shirt has to offer, making it a stellar choice for any outdoor adventure.